Controller for water-heaters, &amp;c.



N. G. GOREAU. CONTROLLER Pon WATER HEATBRS, sw.

APPLICATION FILED MMLSI, 1011.

Patented Oct. 27, 1914Y NELSON G. GOREAU, l

il w i 1Min',

il FENT operen.

uw ORLEANS, LomsIANiy CNTROLLER FOR WATER-HEATERS, &o.

Specification of Letters Patent.

Patented oet. et, 1914.

Application led March 31, 1911. Serial No. 68,199.

To all 'whom it may concern:

Be it known that I, NELSON G. Gonnma citizen of the United States, residing at New Orleans, in the parish of Orleans and State ot Louisiana, have invented a new and useful Controller for Tater-Heaters, &c., of which the following is a specification.

My invention relates to an automatic gas cont-roller designed with especial reference to useein an automatic water heater, but it is to be understood that the invention may be applied to other uses.

principal object of the invention is to provide 'a controller of simple and durable construction which will give a close regulation of temperature of the heated water.

More particularly, an object of the invention is to provide a thermostat which effects an equalization of pressures in two water chambers, this equalization being accomplished either at the inlet or outlet of said chambers.

The invention also provides means for @rating differential pressuresin the different chambers to overcome the tension of a regu` lating'spring by means of which the gas valve is operated.

I will now describe an exemplify/ing construction in which the invention is embodied. This is the best form that I have up to the present time devised but it should be understood that the invention is capable of embodiment in other forms.

In the drawing, Figure 1 is an outline sketch in elevation of a convenient form of water heater with my controller applied to it; and Fig. 2 is a vertical section of the controller.

In Fig. 1 H designates a casing or housing 'for ya water heater containing any suitable water-heating container, such as the coil C. R, designates the controller as a whole. This conveniently located outside the easing, as shown. B is a burner, one or more of which may be provided as desired.

Referring now to Fig. 2, diaphragm easing l contains diaphragm 2. Upon the easing is secured a pipe 3 which forms the outer portion of the thermostat and may be identified couveuicntly as a shelh The diaphragm casing has a horizontal partition 4 and upon this is `fastened a tube 5 extendingr up within the shell. This tube forms the inner portion of the thermostat and may be identified simply as a tube. 'lube 5 is yt)ging[raterial` til/greater capacity pans'ion than shell 3, `so that ,when water passing through thev shell is .heated the tube 5 expands faster than theshell,1 and a0 when the water temperature finally reaches a determined point the valve opening 'formed at the upper end of the tube is gradually closed and finally completely yclosed to cut ott' the supply of water to cham- 65 ber 7. The shell El communicates with the chamber 6 in the easing and the tube with chamber? above the diaphragm. An angular artition 8 separates chamber. 6 from the diseiarge chamber 9 to which the service 70 justed by turning the bushing 13 and the 75 extent oi opening of the valve may beregu lated by means of the ,threaded `stem 14. Below the diaphragm is `another chamber 1 0. Water 4trom the heater'isadmitted near the upper end of the shell atl. Chamber 80 10 connecte with discharge chamber 9.at a point beyond the regulating valve through a small passage 16 and chamber 10 connects with the discharge chamber by .a passaged?.

Communication between the upper end .0f

tube 5 and the water supply 1n shell 34is regulated by an adjustable valve Q0. Secured below the diaphragm easing is a gas valve easing 25 containing gas valve' .26 which is urged to close by spring 27.

(his enters at S and passes at 29 to the burner.

Yormally.y when water is'not being used, regulating valve ill is held closed its spring; thermostat valve 20 is open since the 95 thermostat is cold; the gas valve is closed by its sprmg S27. It there is a demand for hot water a valve in the service pipe .is

opened. reducing pressure in the serviceline and in discharge chamber 9. The constant pressure at the supply etmnertion 15 andin chamber now overcomes the effect of springr l? and the regulator opens and water flows to the servit-e pipe through opening `S.

Dit the same time water passes the therlnostat valve .20 aud going through tube 5 supplies pressure to chamber 7, thus depress-- ing the diaphragm and opening the gas valve QG. Gas now flows to the burners and being ignited. usually by a pilot ligl1twater 110 in the heating coil is heated. Spring l2 maintains a pressure m chambers 6 and 7 membor dividing the motor into two prosmotor are jointly controlled by the How and sure chambers, one of sind chambers lmvmg temperature of the water bemg dlschurged communlcatlon Wlth Saud coudult, the other from suld condult.

having communication with said by-pass, NELSON G. GOREAU. 5 and thermostnto means governed by the Wtne-ssos:

heated water adapted to control Said by- BYRON L. POND,

pass whereby the ooctivc pressures in said I ANDREW H. VILSON. 

